Hadronic matter form factors:pp,πp, and the valon model

We define the "matter form factor" (MFF) in hadron-hadron elastic scattering as the Fourier-Bessel transform of the eikonal. The MFF's for $\mathrm{pp}$ and $\pi p$ are extracted directly from the measured differential cross sections. We show that the valon model is a convenient framework in which these form factors can be analyzed and related to each other.